Warrior Formation

The Cambrian Warrior Formation is a mapped limestone bedrock unit in Pennsylvania.

Warrior Formation
Stratigraphic range: Cambrian
Outcrop showing cryptozoa layers at Bakers Summit, Bedford County
Typesedimentary
UnderliesGatesburg Formation
OverliesPleasant Hill Formation
Thickness250 ft at type sections,[1] 1350 ft in Nittany Arch,[2] 746 ft at Waddle.[3]
Lithology
Primarylimestone
Othershale, siltstone, sandstone
Location
RegionAppalachian Basin
CountryUnited States
ExtentBedford Co., Blair Co., Centre Co., Huntingdon Co.[4]
Type section
Named forWarrior Run, Blair County
Named byC. Butts, 1918[1]

Description

The Warrior Formation is described by Berg and others as gray, thin- to medium-bedded, fossiliferous, cyclic limestone bearing stromatolites, interbedded with shale, siltstone, and sandstone.[5]

Fossils

Cryptozoon undulatum from Bakers Summit

Notable Exposures

Age

Relative age dating places the Warrior Formation in the middle to late Cambrian.

References

  1. Butts, Charles, 1918, Geologic section of Blair and Huntingdon Counties, central Pennsylvania: American Journal of Science, 4th series, v. 46, p. 523-537.
  2. Wilson, J.L., 1952, Upper Cambrian stratigraphy in the central Appalachians: Geological Society of America Bulletin, v. 63, no. 3, p. 275-322.
  3. Tasch, Paul, 1951, Fauna and Paleoecology of the Upper Cambrian Warrior Formation of Central Pennsylvania, Journal of Paleontology, Vol. 25, No. 3, pp. 275-306, pls. 44-47, May 1951 abstract
  4. USGS Mineral Resources On-Line Spatial Data, retrieved 4 Mar. 2011
  5. Berg, T.M. (compiler), 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey State Map, 4th series, 1, 1 sheet, scale 1:250,000
  6. Charles Butts, 1945. Hollidaysburg-Huntingdon folio, Pennsylvania, Folios of the Geologic Atlas 227. United States Geological Survey.


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